Adjustable timing gear



FIG. 1 is a perspective view of an adjustable timing gear showing my new design;

FIG. 2 is a front elevational view thereof, the right side, left side, and rear elevational views being substantially identical thereto;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is a bottom plan view thereof.

The broken line showings of FIGS. 1-4 are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an adjustable timing gear, as shown and described. 